﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System.Windows;
using System.Windows.Input;
using System.Windows.Media;

namespace Xceed.Silverlight.Utils
{
  internal static class FocusHelper
  {
    public static bool HasFocus( FrameworkElement element )
    {

#if !SILVERLIGHT
      Window elementWindow = Window.GetWindow( element );

      if( elementWindow == null )
        return false;

      DependencyObject focusedElement = FocusManager.GetFocusedElement( elementWindow ) as DependencyObject;

      for( DependencyObject obj = focusedElement; obj != null; obj = VisualTreeHelper.GetParent( obj ) )
      {
        if( object.ReferenceEquals( obj, element ) )
        {
          return true;
        }
      }

      return false;
#else
      DependencyObject focusedElement = FocusManager.GetFocusedElement() as DependencyObject;

      for( DependencyObject obj3 = focusedElement; obj3 != null; obj3 = VisualTreeHelper.GetParent( obj3 ) )
      {
        if( object.ReferenceEquals( obj3, element ) )
        {
          return true;
        }
      }

      return false;
#endif
    }
  }
}
